云南都龙高铁闪锌矿的活化试验研究

对云南都龙矿区高铁闪锌矿进行了活化试验研究, 结果表明, 都龙矿区高铁闪锌矿在pH=14时, 硫酸铜的活化效果最好。新型高效活化剂L-1在pH=9时活化效果最好。与硫酸铜相比, 活化剂L-1不仅可以在低碱度条件进行活化, 铁闪锌矿的浮选回收率提高18.1个百分点, 而且具有明显的成本优势, 这为减少石灰用量、合理有效回收其它硫化矿物以及综合回收共伴生的稀有金属提供了必要的前提条件。     

用高效捕收剂QF提高某金铜矿金回收率的研究

针对某金铜矿山矿石性质复杂,金铜回收率较低的问题,采用新型高效的捕收剂QF对该矿矿石进行浮选。实验结果表明,采用QF作为该金铜矿石的捕收剂,可提高铜回收率3%以上,提高金回收率10%以上,QF对提高金铜矿石的浮选指标,特别是对提高金的回收率具有很好的效果。     

一种基于FPGA的计算机层析重建的方法

提出一种基于FPGA的计算机层析重建的方法,即借助FPGA的高速数据处理能力来提高计算机层析重建的速度.采用自顶向下的方法,将FPGA依据功能划分为几个模块,并详细论述了各个模块的设计方法和控制流程.FPGA模块的设计采用VHDL语言编程和内部已有的小模块相结合的方法来实现,并利用时钟信号对模块内部以及模块之间运算和数据流程进行控制.整个软件设计和综合模拟仿真在Quartus ||开发平台中完成,同时也给出了一些模块仿真的波形.     

Super-resolution vibrational microscopy by stimulated Raman excited fluorescence

Inspired by the revolutionary impact of super-resolution fluorescence microscopy, super-resolution Raman imaging has been long pursued because of its much highe...     

真空磁绝缘线B-dot电流探测器的研制

为了测量阳加速器新真空磁绝缘线的电流,研制并标定了B-dot探测器。2个B-dot的探测器分别安装在磁绝缘线的入口和中部,输出信号与被测电流的微分成正比,经RC积分后获得电流信号。B-dot探测器采用在线标定,当阴阳极短接点数量较少,且位置距离探测器较近时,会因真空绝缘线(MITL)电流密度不均匀导致标定不准确,故需增多短接点。当短接点的位置距离探测器约2m时,即使只设置2个连接点,探测器位置的MITL电流密度近似均匀。加速器实验结果表明:在MITL阴阳极较近的位置,将B-dot探头安装在阳极孔中不影响磁绝缘效果,B-dot探测器测试稳定可靠,其设计和标定方法可行。     

Φ508 mm×9.5 mm L450MB钢级ERW管线管的试制

焊缝冲击功低且不稳定是ERW管线管生产的一大技术难点。针对高钢级L450MB焊管存在焊缝冲击功不稳定的情况,宝山钢铁股份有限公司宝钢分公司钢管厂采取降低焊接速度、调整热处理工艺的技术方案,试制出焊缝冲击韧性符合标准要求的L450MB钢级ERW管线管。     

低气压富氧环境对薄壁材料火焰传播速度的影响

通过模拟高原低气压环境,研究富氧环境下火焰沿薄壁材料表面传播速度的变化情况.研究表明,大气压力不变时,氧气体积分数越大,火焰传播速度越快;氧气体积分数不变时,火焰传播速度随着大气压力的增大而加快;维持氧分压为一定值时,大气压力越大火焰传播速度越小.大气压力为1 01.3 kPa、氧气体积分数分别为20.9%和23%时,火焰沿薄壁材料表面的传播速度为2.47 mm/s和3.01 mm/s,参照此速度得出了在不同大气压力下,火焰传播速度为2.47 mm/s和3.01 mm/s时对应的氧气体积分数.     

High efficient production of hydrogen from crude bio-oil via an integrative process between gasification and current-enhanced catalytic steam reforming

High efficient production of hydrogen from the crude bio-oil was performed in the gasification-reforming dual beds. A recently developed electrochemical catalytic reforming method was applied in the downstream reforming bed using NiCuZnAl catalyst. Production of hydrogen from the crude bio-oil through both the single gasification and integrative gasification-reforming processes was investigated. The maximum hydrogen yield of 81.4% with carbon conversion of 87.6% was obtained through the integrative process. Hydrogen is a major product (∼73 vol%) together with by-products of CO₂ (∼26 vol%) as well as very low content of CO (<1%) and a trace amount of CH₄ through the integrative route. In particular, the deactivation of the catalyst was significantly depressed by using the integrative gasification-reforming method, comparing to the direct reforming of the crude bio-oil. The mechanism and evaluation for the downstream electrochemical catalytic reforming were also discussed. The integrative process with higher hydrogen yield and carbon conversion, potentially, would be a useful route to produce hydrogen from the crude bio-oil.